Mowat Construction Company: Projects
- Alaska
- Washington
- Fremont Bridge
- Newport Way to I90 Widening
- Green River Bridge
- Snohomish Machias Bridge
- Sauk River Bridge Replacement
- York Bridge Replacement
- Aurora Bridge
- Edgewick Bridge Replacement
- SR 16, Union to Jackson Steel
- High Bridge Replacement
- Nuclear Fuel Canister Storage Building
- SR 16, Sprague to Snake Lake
- Meydenbauer Bridge Replacement
- I-5, 2nd St. Bridge
- SR 16, Union to Jackson
- York Bridge Superstructure
- Seattle Freeway Park
- Seattle Westlake Park
- Weller Street Elevated Pedestrian Walkway
- Eastgate Transit Access
- Seatac South 160th St. Loop
- Oregon
- Idaho
- Nevada
- Alaska
Mowat Construction Company: Projects
York Bridge No. 225C
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| Client/Owner: | King County |
| Location: | Redmond, WA |
| Cost: | $9,100,000 |
| Awards: | Outstanding Example of Excellence in Concrete Construction Washington Aggregates and Concrete Association |
This project replaced the existing York Bridge No. 225C on NE 116th Street at the Sammamish River. The new structure includes a pile supported concrete arch substructure with a precast girder and cast in place deck superstructure. Fifty-two closed end pipe piles 24” in diameter were necessary to support the new bridge structure. The tonnage required for support of Piers 1 to 3 was 450 tons, requiring piles to be driven to depths of 93’ to 142’ for embedment. The Pier 4 piles were over-driven to 550 tons in anticipation of settlement issues expected by the design. The soils were predominately soft until bedrock was reached, so a hammer with a hydraulic trip was used to facilitate driving in these soft conditions.